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2x-20=-5x+8
We move all terms to the left:
2x-20-(-5x+8)=0
We get rid of parentheses
2x+5x-8-20=0
We add all the numbers together, and all the variables
7x-28=0
We move all terms containing x to the left, all other terms to the right
7x=28
x=28/7
x=4
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